3 files changed, 35 insertions, 0 deletions
diff --git a/pkg/tcpip/buffer/buffer_unsafe_state_autogen.go b/pkg/tcpip/buffer/buffer_unsafe_state_autogen.go
new file mode 100644
index 000000000..5a5c40722
--- /dev/null
+++ b/pkg/tcpip/buffer/buffer_unsafe_state_autogen.go
@@ -0,0 +1,3 @@
+// automatically generated by stateify.
+
+package buffer
diff --git a/pkg/tcpip/buffer/view.go b/pkg/tcpip/buffer/view.go
index 91cc62cc8..b05e81526 100644
--- a/pkg/tcpip/buffer/view.go
+++ b/pkg/tcpip/buffer/view.go
@@ -239,6 +239,16 @@ func (vv *VectorisedView) Size() int {
 	return vv.size
 }
 
+// MemSize returns the estimation size of the vv in memory, including backing
+// buffer data.
+func (vv *VectorisedView) MemSize() int {
+	var size int
+	for _, v := range vv.views {
+		size += cap(v)
+	}
+	return size + cap(vv.views)*viewStructSize + vectorisedViewStructSize
+}
+
 // ToView returns a single view containing the content of the vectorised view.
 //
 // If the vectorised view contains a single view, that view will be returned
diff --git a/pkg/tcpip/buffer/view_unsafe.go b/pkg/tcpip/buffer/view_unsafe.go
new file mode 100644
index 000000000..75ccd40f8
--- /dev/null
+++ b/pkg/tcpip/buffer/view_unsafe.go
@@ -0,0 +1,22 @@
+// Copyright 2021 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package buffer
+
+import "unsafe"
+
+const (
+	vectorisedViewStructSize = int(unsafe.Sizeof(VectorisedView{}))
+	viewStructSize           = int(unsafe.Sizeof(View{}))
+)